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Патент USA US2407188

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Sept. 3, 1946.
2,407,188
w. s.‘ SUTTON
BURNER
FiledSept. 27, 1943
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MTTOEHEYS
Patented Sept. 3, 1946 '
‘ 2,407,188
. UNITED . STATES
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PATENT
2,407,188
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BURNER =
OFFICE
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William-.8. ,Sutton, Rockford, 111. ‘
‘ Application September 21, 1943, Serial'No. 503,951
10 Claims.
(01. nos-2s)
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The invention pertains to burners 'for- installa
tion in the ?re box of a furnace or boiler, andit
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mitted: through one‘ wall so as, to impinge ‘upon
a ba?ie l2'so as to insure intimate mixture 5in
ha's'particular reference to a burner designed for
the use of powdered‘fuel such as pulverized coal.
the chamber.’ Ignition takes place the‘ cham
ber and burning gasesare discharged through
--The ‘primary object of the ‘invention is to pro
an annular slot l3 ‘opposite-the inlet‘ and directed
horizon-tally across a-_ rising column ‘of ‘secondary
air admitted to the ‘fire box in the usual‘ way.
In the present illustrativerembodiment of the
vide a burner in which fuel and air are intro
duced and intermixed ‘in a novel and advanta
geous manner so as ‘to promote e?icient combus
‘ invention, the “annular chamber l-l formed‘by the
A further object ‘is to provide a burner struc-' 10 burner head-{is of oval cross section While the
ture for use in the combustion chamber of a
structure of the burner-head is substantially
furnace or boiler and. having an ‘annular burner
c-shaped in cross section ‘so as to form a closed
head providing a combined mixing and combus
outer wall I4 andan inner wall ‘I15 apertured to
tion.
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tion chamber of advantageouscharacter to which
the ‘powdered v"coal and air ‘are, supplied ‘ for inti
mate mixture. .
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Still‘ another object is to‘provide a‘sburner head
formthe outlet slot I3.
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As shown, the burnerstructure is composed 0
two head members [6 and H separated by “a
spacer ring ‘I8 and‘each shaped‘to-yform a semi
of the character set forth in which the air ‘and
circular channel, -with the two channels in ope
fuel is supplied under "pressure to an annular
posed relation. Due to the interposition of the
chamber and discharged through ‘an annular ‘dis--, 20 spacer'ring'JB, the chamber assumes a vertically
charge nozzle opening inwardly‘ orv centrally v‘of
elongated or oval form and theinner sides ‘of
the head.
the two members occupy a spaced‘relation to
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A; further object .is to' provide a burner for‘
form the slot 13.
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powdered‘ fuel adapted to receive an‘ initial supe‘
' ‘The burner head maybe supported in‘any suit
ply of oil or other liqu‘id‘fuel capable‘ jofbe‘ing 25 able or preferred manner in the combustion
ignited
easily.
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Another object is'to provide :an 'auxiliary'oil
supply to the ‘burner when desirable for the pur
pose of‘ enriching ‘the combustible mixture.
The objects "of the ‘invention, thus generally
stated, together with other and ancillary advan
tages are'attained :by the construction and ar
rangement shown by way of illustration in the
accompanying drawing forming a part ‘hereof, in
which:
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Figure 1 is ‘a schematic view of ‘the improved
burner and anassociated‘fuel supply system.
Fig. ,2 is a fragmentary vertical sectional view
through the burner taken approximately ‘in-the
line 2—2 of ‘Fig. 1, but on a larger scale.
Fig. 3 is a fragmentary horizontal sectional
view taken approximately in the line 3—3 of
Fig. ‘2.
‘Fig. 4 is a fragmentarypsectional view taken
approximately in the plane 4-4 of ‘Fig. .l and
also on an enlarged scale.
‘
chamber or fire box in which it is to ice used.
As herein shown, it is clamped between upper
and lower supporting members ‘l9 and 20 detach,
ably secured together ‘by means of bolts 20'.
The lower ,one of the ‘two supporting members
is shown equipped with supporting legs 2| and
in the present instance “the upper oneof the two
members carries aplurality of ‘posts ‘22 for sup
porting :a ‘ba?‘le plate 23 adapted. to deflect the
,_ ?ames laterallyoutward against the sides of the
?re box. The‘ba?le plate is equipped with studs
24 for engagement with sockets 25 in the posts.
In the preferred embodiment of 'my'invention,
powdered‘ coal‘is supplied ‘to the annular cham
40 ber ll ‘through ‘the medium of‘an annular feed
channel ‘26 which‘ is conveniently formed in part
by the spacing ring [8 and ‘in part by an encir
cling ring 2! having radial ‘lugs 28‘ clamped be
tween the two main supporting members. From
' "*the ‘inner side. of the feed channel 26 two series
of dischargeports '29 and 30 lead respectively
The improved ‘burner is adaptedw'to be posi
tioned centrally within the combustion chamber
upwardly and downwardly as well as inwardly ‘for
discharge into the annular chamber ll. As
or ?re box of a furnace, boiler or other'heating
shown in Fig. ‘3, the ports ‘29, 30 are ‘spaced apart
plant (not shown). It comprises, in general, a
burner head In providing acombined mixing and
circumferentially and "the ports of one series are
combustion chamber H to which ‘fuel in the
of the other.
preferably staggered with respect to the ports
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form of powdered coal is delivered‘with air under
'The-‘ba?le ring [2 may conveniently be cast in‘
pressure. Theychiamber H is preferably annular
tegralwith the spacing ring M.‘ ‘It is shaped'to
provide twocircular ‘wings respectively, project
in ‘form and the incoming fuel and ‘air is ad
2,407,188
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ing toward the top and bottom of the annular
chamber ll, thereby forming an approximately
streams upon the wings of the baffle ring 12.
Moreover, the division of the mixture into upper
vertical web disposed adjacent to the outer pe
ripheral wall of the chamber so as to be impinged
and lower portions by the use of two series of
ports, while guiding and directing such portions
oppositely, causes them to impinge upon each
other forwardly of the baille ring, thereby addi
tionally promoting intermixture and e?icient
combustion.
To facilitate ignition in starting the burner in
operation, provision is made for the use of an
easy starting fuel such as oil. To this end, the
trough or bowl-like character of the bottom of
upon by the incoming mixture of fuel and air in
the manner which will presently appear.
The means for delivering the powdered fuel
to the burner head is of the type in which pri
mary air supplied under pressure is utilized for
entraining the ‘fuel as it is fed from its source of
supply. »As shown in Fig. 1, 3| designates a fuel
hopper having at its outlet 2. motor driven feed
device 32 acting to deliver a measured ?ow of fuel F ' the mixing chamber is utilized to advantage.
, Thus, I provide an oil supply pipe 50 leading from
into a chamber 33 interposed in a feed line 34, the
a supply tank 5| to an inlet port 52 opening into
latter having branch lines 35 and 36 respectively ‘
discharging at diametrically opposed points 'into - i. I the bottom of the chamber. The pipe is equipped
with a valve 53 to permit of the ?ow of a small
the annular feed channel 26 tangentially thereof
' quantity of fuel into the bottom of the chamber
(Fig. 3).
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where it may be ignited.
To supply air under pressure to theffeed'line'
The improved burner structure also lends itself
34, to provide an additional supply of primary air, 20
readily to the supply when desired of an auxil
and to supply air to the; upper portionv of the
iary fuel such as .oil for the purpose of enrich
hopper so (as to promote proper feeding ofnfuel
ing the mixture, thereby permitting the use of a
from the‘hopper, I provide a blower 31 having
low grade of powdered coal. 'For this purpose,v
algmainv discharge line 38 leading to the burner
each of the burner head members is provided with
headfor the purpose of supplying air under pres
a‘ series of inlet ports 54 connected by radial
sure to the burner, and a branch line 39 connect
passages 55 with annular supply channels 56 and
ed with the upper portion of the hopper,the. feed
51 respectively in the two burner head members.
pipe 34 being connected to the branch line 39.
Fuel oil is supplied from a tank 58 under the'con
To regulate the volume of air supplied to the
burner, _a suitable valve 40 is interposed in the
30 trol of a suitable regulating device 59 to a supply
main air line 38. Similarly, a valve 4| is pro
vided in the branch line 39 so as to control the
volume of air supplied to the hopper and to the
fuel feed line 34.
BI leading respectively'to the supply channels 56
and 51.
line 60, the latter having two branches 60 and
The fuel feeding devicel3-2 associated with the a
In operation, a small quantity of oil or other
starting fuel is ?rst admitted to the bottom of
hopper may be of any suitable or preferred char
the mixing chamber by suitably operating the
acte'r. As shown, it comprises a ‘disk 42 (Fig. 4)
shut off valve 53 in the pipe line 50. The blower
31 is then set in operation and the motor of the
having anannular groove in its periphery and
mounted in a housing 43- communicating with
thechamber 33 in the feed line. The disk 42 is
driven by a motor 44. and the amount of. fuel de
feed device similarly started. Air thus supplied
to the fuel feed linev 34 acts to entrain fuel de
49 livered
by the feeding device 32 into the cham
livered'thereby to the chamber 33 is determined.
by the position of a slide 45 adjustably mounted
on one side of the hopper and projecting’ into
the housing 43 forcoact‘ion with the disk. '
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ber 33, and the mixture of fuel and air is thus
delivered to the feed channel 26 in the burner
head for discharge through the two series of ports
29 and 30 ‘into the annular chamber ll of the
The main air supply line 38 is connected with
the burner head through the medium of an inlet
burner head.
pipe'46 discharging tangentially at thebottom of
ports 29 and 30 communicate with the annular
mixing chamber through ,the medium .of these
slots. Thus the inner ends of the ports open into
the slots at the point of discharge of the latter
main air supply line 38 to the annular air cham
ber 41 encircling the burner, from which it passes
through the slots 48 into the inner ends of which
the fuel ports 29, 30 discharge. Thus a mixture
of ‘air and powdered coal is delivered to the
chamber H through the outer wall thereof and
this mixture is divided into two portions de?ected
by the ba?ie l2 so as to follow respectively the
upper and lower curved surfaces of the chamber
I I. Finally the two portions of the mixture im
pinge one upon the other inwardly of the baffle
ring, thereby insuring an intimate and thorough
mixture of the fuel and air for ignition in the
chamber.
The burning gases are discharged centrally of
the burner so as to intersect a rising column of
secondary air admitted to the ?re box from be
low, and at a point spaced upwardly from the
burner the ?ames impinge upon the ba?ie plate
23 so as to‘be de?ected outwardly against the
sides of the ?re box. It will of course be under
stood that if desired, the bailie plate 23' may be
into the mixing chamber, as shown clearly in
omitted when desired.
an annular air chamber 41 surrounding the burn
er head and formed by the two supporting cast- ~
ings l9 and 2|]. As shown in Fig. 2, the inlet
pipe 46 is formed as a part of the lower support
ing member 20 and communicates freely with
said annular air chamber. It will be understood
that free communication is also permitted be- -
tween the upper and lower portions of the air
chamber due to the fact that the ring 21 is sup
ported by radial lugs28.'
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From the air chamber 41 air is admitted to
the annular chamber ll of the burner head
through narrow horizontal slots 48 formed be
tween the respective head members and the cen
tral spacing ring I8, the head members being
formed with spacing bosses 49 at circumferen
tially spaced points. Preferably, the fuel outlet
Fig. 2.
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The construction and arrangement thus set
forth insures a complete and thorough mixing of
Simultaneously, air is supplied through the
When burning a low grade of fuel, or under
other conditions when enrichment of the mixture
is rendered desirable, fuel oil may be supplied
to the burner head from the tank 58. In this
the-main air supply with that utilized for feeding
purposes, the mixture impinging in separate 75 connection, itwill be observed that the intro
2,407,188?
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annular, outlet slotj ‘narrower in vertical height
duction of such additional source of fuel ‘to the
mixing ‘chamber through the top and bottom walls
than‘ the spacing of‘ said top, and bottom walls,‘
and said‘top and bottom walls beingiofconcave‘
contour, means providing passages’ extending
thereof is advantageous in ‘that it is over these
walls, that the primary mixture of air and ‘pow
dered fuel is caused ‘to sweep in the operationof
the
burner.
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through said outer'wall into said chambenan'dl
means for‘isupplying a ‘mixture of powdered fuel
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The construction thus provided has been found
and air under pressure to said passages, certain‘
to operate with a high degree of efficiency. More
of said passages extending upwardly to project
over, the structure is relatively simple, with no
the air and fuel mixture into said chamber to
moving parts with the exception of the blower, 10 ward said top wall, and the other passages ex
and feed device, and is accordingly relatively
tending downwardly into said chamber to project
trouble free.
the fuel and air mixture toward said bottom wall.
I claim‘ as my invention:
6. A powdered fuel burner comprising, in com
1. A burner of the character set forth com
bination, aburner head having an annular hori
prising, in combination, a burner head‘compris 15 zontally disposed chamber de?ned by outer,
ing upper and lower members each having a semi
inner, top, and bottom walls, said inner wall hav
circular channel, a spacer ring interposed be
ing an annular outlet slot narrower in vertical
tween said members with said channels in opposed
height than the spacing of said top and bottom,
relation to form a mixing and combustion cham
walls, means providing passages extending up
ber, said members de?ning an annular outlet 20 wardly and downwardly through said outer wall
opening at the inner side of said chamber, and
into said chamber and diverging away from each
means for supplying fuel to said chamber includ
other toward said top and bottom walls respec
ing an annular channel in said spacer ring and
tively so as to direct streams of air and fuel mix
ports connecting said channel with said chamber. ' ture respectively toward said top and bottom
walls, means for supplying a mixture of powdered
2. A burner of the character set forth compris
fuel and air under pressure to said passages, and 7'
ing, in combination, a burner head comprising '
means for supplying additional .air under pres
upper and lower members each having a semi
sure through said outer wall and into said cham
circular channel, a spacer ring interposed be
,_ ber adjacent the points of entry of said fuel and
tween said members with said channels in op
posed relation to form a mixing chamber, said 30 air mixture.
7. A powdered fuel burner comprising, in com
members de?ning an annular outlet opening at
bination, a burner head providing an annular hor
the inner side of said chamber, means for supizontally disposed chamber having inner, outer,
porting said members comprising upper and lower
sections clamping said two members together with
said spacing ring interposed between them, and
top’ and bottom walls, said inner Wall having an
35 annular opening therein narrower than the spac
ing of said top and bottom walls, ba?le means
inlet slots formed between opposite sides of said
projecting into said chamber from said outer wall
spacer ring and said burner members.
and de?ning adjacent the outer wall upwardly
3. A burner of the character set forth compris
anddownwardly inclined surfaces which diverge
ing, in combination, a burner head comprising
upper and lower members each having a. semi 40 away from each other toward said top and bot
tom walls and terminate short of said opening,
circular channel, a spacer ring interposed be
and means for delivering a mixture of powdered
tween said members with said channels in op
fuel and air under pressure through said outer
posed relation to form a mixing chamber, said ,
wall and in separate streams respectively directed
members de?ning an annular outlet opening at'
toward and against said upwardly and down
the inner side of said chamber, means for sup
wardly inclined ba?le surfaces.
portmg said members comprising upper and lower
8. A powdered fuel burner comprising, in com
sections clamping said two members together with
bination, a burner head providing an annular hor
said spacing ring interposed between them, and
izontally disposed chamber having inner, outer,
fuel and air inlet means including air slots formed
top, and bottom walls, said inner wall having an
at opposite sides of the spacer ring and fuel supply
annular openingtherein narrower than the spac
ports opening into said chamber at the inner ends
ing of said top and bottom walls and said top and
of said slots.
,
bottom walls being of concave contour, ba?le
4. A powdered fuel burner comprising, in com
' means in said chamber de?ning adjacent the
bination, a burner head having an annular hori
zontally disposed chamber de?ned by outer, in~
ner, top, and bottom walls, said inner wall hav
ing an annular outlet slot narrower in vertical
height than the spacing of said top and bottom
walls, means forming an annular fuelsupply _
channel surrounding said outer wall, means for 60
supplying a mixture of powdered fuel , and air
outer wall upwardly and downwardly inclined
surfaces which diverge away from each other to
ward said concave top and bottom walls, and
means for delivering a mixture of powdered fuel
and air under pressure through said outer wall
and in separate streams respectively directed to
ward and against said upwardly and downwardly
. inclined ba?le surfaces.
under pressure to said channel, and means pro
9. A powdered fuel burner comprising, in com
viding a plurality of passages extending from
bination, a burner head providing an annular
said channel through said outer wall to connect
the channel and said chamber, certain of said 65 chamber having inner and outer walls and a con
necting wall, said inner wall having an annular
passages being inclined upwardly from said chan
opening therein narrower than the axial height of .
nel to direct streams of air and fuel mixture into
said chamber upwardly toward said'top wall and
said chamber, ba?le means in said chamber hav
ing a surface disposed opposite said outer wall
certain of the passages being inclined downwardly
from said channel to direct the air and fuel mix 70 and inclined toward ‘said connecting wall and
ture downwardly toward said bottom wall.
5. A powdered fuel burner comprising, in com
bination, a burner head having an annular hori
zontally disposed chamber de?ned by outer, inner,
terminating short of the latter and said annular
opening, and means for delivering a mixture of
powdered fuel and air under pressure through
said outer wall and into said chamber and against
top, and bottom walls, said inner wall having an 75 said baffle surface.
2,407,188
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10. A powdered fuel burner comprising, in com
bination, a burner head providing an annular
chamber having inner, outer, top, and bottom
walls, said inner wall having an annular opening
therein narrower than the spacing of said top
and bottom walls, a ba?‘le ring supported within
said chamber and dividing the latter into upper
and lower portions, and means for delivering a
mixture of powdered fuel and air under pressure
through said outer wall and in separate streams
directed into said upper and lower portions and
against the opposite side surfaces of said baf?e
ring.
WILLIAM S. SU'I'I‘ON.
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